Finding the Fourth Proportional to 591,499.46, 887,248.78 and 142,220.18

Step by Step Solution

1. Step 1: Write the proportion equation
   591,499.46 : 887,248.78 = 142,220.18 : x
2. Step 2: Convert to fraction form
   591,499.46/887,248.78 = 142,220.18/x
3. Step 3: Cross multiply
   591,499.46x = 887,248.78 × 142,220.18
4. Step 4: Simplify right side
   591,499.46x = 126,184,681,196.38
5. Step 5: Solve for x
   x = 126,184,681,196.38/591,499.46
6. Step 6: Final answer
   x = 213,330.17